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h2database
Commits
56b943f8
提交
56b943f8
authored
3月 19, 2014
作者:
Thomas Mueller
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
An archive tool that uses chunk sorting and compression
上级
299c26f5
隐藏空白字符变更
内嵌
并排
正在显示
2 个修改的文件
包含
159 行增加
和
117 行删除
+159
-117
ArchiveTool.java
h2/src/tools/org/h2/dev/fs/ArchiveTool.java
+147
-105
ArchiveToolStore.java
h2/src/tools/org/h2/dev/fs/ArchiveToolStore.java
+12
-12
没有找到文件。
h2/src/tools/org/h2/dev/fs/ArchiveTool.java
浏览文件 @
56b943f8
...
...
@@ -23,7 +23,6 @@ import java.util.ArrayList;
import
java.util.Arrays
;
import
java.util.Collections
;
import
java.util.LinkedList
;
import
java.util.Random
;
import
java.util.TreeMap
;
import
java.util.zip.Deflater
;
import
java.util.zip.DeflaterOutputStream
;
...
...
@@ -34,12 +33,12 @@ import java.util.zip.InflaterInputStream;
* dependencies except for the Java libraries.
*/
public
class
ArchiveTool
{
/**
* The file header.
*/
private
static
final
byte
[]
HEADER
=
{
'H'
,
'2'
,
'A'
,
'1'
};
/**
* The number of bytes per megabyte (used for the output).
*/
...
...
@@ -67,35 +66,36 @@ public class ArchiveTool {
System
.
out
.
println
(
"-extract <file> <targetDir>"
);
}
}
private
static
void
compress
(
String
fromDir
,
String
toFile
)
throws
IOException
{
long
start
=
System
.
currentTimeMillis
();
long
size
=
getSize
(
new
File
(
fromDir
));
System
.
out
.
println
(
"Compressing "
+
size
/
MB
+
" MB"
);
InputStream
in
=
getDirectoryInputStream
(
fromDir
);
String
temp
=
toFile
+
".temp"
;
OutputStream
out
=
new
BufferedOutputStream
(
new
FileOutputStream
(
toFile
),
32
*
1024
);
Deflater
def
=
new
Deflater
();
// def.setLevel(Deflater.BEST_SPEED);
out
=
new
BufferedOutputStream
(
new
DeflaterOutputStream
(
out
,
def
));
sort
(
in
,
out
,
temp
,
size
);
in
.
close
();
out
.
close
();
System
.
out
.
println
();
System
.
out
.
println
(
"Compressed to "
+
new
File
(
toFile
).
length
()
/
MB
+
" MB in "
+
(
System
.
currentTimeMillis
()
-
start
)
/
1000
+
" seconds"
);
InputStream
in
=
getDirectoryInputStream
(
fromDir
);
String
temp
=
toFile
+
".temp"
;
OutputStream
out
=
new
BufferedOutputStream
(
new
FileOutputStream
(
toFile
),
32
*
1024
);
Deflater
def
=
new
Deflater
();
// def.setLevel(Deflater.BEST_SPEED);
out
=
new
BufferedOutputStream
(
new
DeflaterOutputStream
(
out
,
def
));
sort
(
in
,
out
,
temp
,
size
);
in
.
close
();
out
.
close
();
System
.
out
.
println
();
System
.
out
.
println
(
"Compressed to "
+
new
File
(
toFile
).
length
()
/
MB
+
" MB in "
+
(
System
.
currentTimeMillis
()
-
start
)
/
1000
+
" seconds"
);
System
.
out
.
println
();
}
private
static
void
extract
(
String
fromFile
,
String
toDir
)
throws
IOException
{
long
start
=
System
.
currentTimeMillis
();
long
size
=
new
File
(
fromFile
).
length
();
System
.
out
.
println
(
"Extracting "
+
size
/
MB
+
" MB"
);
InputStream
in
=
InputStream
in
=
new
BufferedInputStream
(
new
FileInputStream
(
fromFile
));
String
temp
=
fromFile
+
".temp"
;
...
...
@@ -109,7 +109,7 @@ public class ArchiveTool {
(
System
.
currentTimeMillis
()
-
start
)
/
1000
+
" seconds"
);
}
private
static
long
getSize
(
File
f
)
{
// assume a metadata entry is 40 bytes
long
size
=
40
;
...
...
@@ -127,33 +127,27 @@ public class ArchiveTool {
}
private
static
InputStream
getDirectoryInputStream
(
final
String
dir
)
{
File
f
=
new
File
(
dir
);
if
(!
f
.
isDirectory
()
||
!
f
.
exists
())
{
throw
new
IllegalArgumentException
(
"Not an existing directory: "
+
dir
);
}
// int: metadata length
// byte: 0: directory, 1: file
// long: created
// long lastModified
// (file only) long: file length
// utf-8: file name
return
new
InputStream
()
{
private
final
String
baseDir
;
private
final
LinkedList
<
String
>
files
=
new
LinkedList
<
String
>();
private
String
current
;
private
ByteArrayInputStream
meta
;
private
DataInputStream
fileIn
;
private
long
remaining
;
{
File
f
=
new
File
(
dir
);
baseDir
=
f
.
getAbsolutePath
();
addDirectory
(
f
);
}
private
void
addDirectory
(
File
f
)
{
File
[]
list
=
f
.
listFiles
();
// breadth-first traversal
...
...
@@ -171,6 +165,13 @@ public class ArchiveTool {
}
}
}
// int: metadata length
// byte: 0: directory, 1: file
// varLong: lastModified
// byte: 0: read-write, 1: read-only
// (file only) varLong: file length
// utf-8: file name
@Override
public
int
read
()
throws
IOException
{
...
...
@@ -210,12 +211,13 @@ public class ArchiveTool {
boolean
isFile
=
f
.
isFile
();
out
.
writeInt
(
0
);
out
.
write
(
isFile
?
1
:
0
);
writeVarLong
(
out
,
f
.
lastModified
());
out
.
write
(!
f
.
canWrite
()
?
1
:
0
);
writeVarLong
(
out
,
f
.
lastModified
());
if
(
isFile
)
{
remaining
=
f
.
length
();
writeVarLong
(
out
,
remaining
);
fileIn
=
new
DataInputStream
(
new
BufferedInputStream
(
new
FileInputStream
(
current
)));
fileIn
=
new
DataInputStream
(
new
BufferedInputStream
(
new
FileInputStream
(
current
)));
}
if
(!
current
.
startsWith
(
baseDir
))
{
throw
new
IOException
(
"File "
+
current
+
" does not start with "
+
baseDir
);
...
...
@@ -232,7 +234,7 @@ public class ArchiveTool {
meta
=
new
ByteArrayInputStream
(
bytes
);
return
meta
.
read
();
}
@Override
public
int
read
(
byte
[]
buff
,
int
offset
,
int
length
)
throws
IOException
{
if
(
meta
!=
null
||
fileIn
==
null
||
remaining
==
0
)
{
...
...
@@ -243,28 +245,22 @@ public class ArchiveTool {
remaining
-=
l
;
return
l
;
}
};
}
private
static
OutputStream
getDirectoryOutputStream
(
final
String
dir
)
{
new
File
(
dir
).
mkdirs
();
return
new
OutputStream
()
{
private
ByteArrayOutputStream
meta
=
new
ByteArrayOutputStream
();
private
OutputStream
fileOut
;
private
File
file
;
private
long
remaining
=
4
;
private
long
modified
;
private
boolean
readOnly
;
// byte: 0: directory, 1: file
// long lastModified
// byte: 0: read-write, 2: read-only
// (file only) long: file length
// utf-8: file name
@Override
public
void
write
(
byte
[]
buff
,
int
offset
,
int
length
)
throws
IOException
{
while
(
length
>
0
)
{
...
...
@@ -303,7 +299,8 @@ public class ArchiveTool {
if
(--
remaining
>
0
)
{
return
;
}
DataInputStream
in
=
new
DataInputStream
(
new
ByteArrayInputStream
(
meta
.
toByteArray
()));
DataInputStream
in
=
new
DataInputStream
(
new
ByteArrayInputStream
(
meta
.
toByteArray
()));
if
(
meta
.
size
()
==
4
)
{
// metadata is next
remaining
=
in
.
readInt
()
-
4
;
...
...
@@ -315,8 +312,8 @@ public class ArchiveTool {
// read and ignore the length
in
.
readInt
();
boolean
isFile
=
in
.
read
()
==
1
;
modified
=
readVarLong
(
in
);
readOnly
=
in
.
read
()
==
1
;
modified
=
readVarLong
(
in
);
if
(
isFile
)
{
remaining
=
readVarLong
(
in
);
}
else
{
...
...
@@ -342,33 +339,23 @@ public class ArchiveTool {
}
};
}
private
static
void
sort
(
InputStream
in
,
OutputStream
out
,
String
tempFileName
,
long
size
)
throws
IOException
{
private
static
void
sort
(
InputStream
in
,
OutputStream
out
,
String
tempFileName
,
long
size
)
throws
IOException
{
long
lastTime
=
System
.
currentTimeMillis
();
int
bufferSize
=
16
*
1024
*
1024
;
int
[]
random
=
new
int
[
256
];
Random
r
=
new
Random
(
1
);
for
(
int
i
=
0
;
i
<
random
.
length
;
i
++)
{
random
[
i
]
=
r
.
nextInt
();
}
DataOutputStream
tempOut
=
new
DataOutputStream
(
new
BufferedOutputStream
(
new
FileOutputStream
(
tempFileName
)));
// TODO document
// temp
// segment1: pos [, pos..., 0], hash, chunk1,..., 0
// segment2: pos [, pos..., 0], hash, chunk1,..., 0
// (compare by hash, value.length, value data,
// so hash conflicts are not a problem anywhere)
// out
// pos [,pos..., 0] chunk1, pos [,pos..., 0] chunk2,..., 0
byte
[]
bytes
=
new
byte
[
bufferSize
];
ArrayList
<
Long
>
segmentStart
=
new
ArrayList
<
Long
>();
long
inPos
=
0
;
long
outPos
=
0
;
long
id
=
1
;
long
lastTime
=
System
.
currentTimeMillis
();
// Temp file: segment* 0
// Segment: chunk* 0
// Chunk: pos* 0 sortKey data
while
(
true
)
{
int
len
=
readFully
(
in
,
bytes
,
bytes
.
length
);
if
(
len
==
0
)
{
...
...
@@ -378,7 +365,7 @@ public class ArchiveTool {
lastTime
=
printProgress
(
lastTime
,
0
,
50
,
inPos
,
size
);
TreeMap
<
Chunk
,
Chunk
>
map
=
new
TreeMap
<
Chunk
,
Chunk
>();
for
(
int
pos
=
0
;
pos
<
len
;)
{
int
[]
key
=
getKey
(
random
,
bytes
,
pos
,
len
);
int
[]
key
=
getKey
(
bytes
,
pos
,
len
);
int
l
=
key
[
3
];
byte
[]
buff
=
new
byte
[
l
];
System
.
arraycopy
(
bytes
,
pos
,
buff
,
0
,
l
);
...
...
@@ -417,10 +404,15 @@ public class ArchiveTool {
segmentIn
.
add
(
s
);
}
}
DataOutputStream
dataOut
=
new
DataOutputStream
(
out
);
dataOut
.
write
(
HEADER
);
writeVarLong
(
dataOut
,
size
);
Chunk
last
=
null
;
// File: header length chunk* 0
// chunk: pos* 0 data
while
(
segmentIn
.
size
()
>
0
)
{
Collections
.
sort
(
segmentIn
);
ChunkStream
s
=
segmentIn
.
get
(
0
);
...
...
@@ -448,8 +440,17 @@ public class ArchiveTool {
writeVarLong
(
dataOut
,
0
);
dataOut
.
flush
();
}
public
static
int
readFully
(
InputStream
in
,
byte
[]
buffer
,
int
max
)
/**
* Read a number of bytes. This method repeats reading until
* either the bytes have been read, or EOF.
*
* @param in the input stream
* @param buffer the target buffer
* @param max the number of bytes to read
* @return the number of bytes read (max unless EOF has been reached)
*/
private
static
int
readFully
(
InputStream
in
,
byte
[]
buffer
,
int
max
)
throws
IOException
{
int
result
=
0
,
len
=
Math
.
min
(
max
,
buffer
.
length
);
while
(
len
>
0
)
{
...
...
@@ -462,25 +463,20 @@ public class ArchiveTool {
}
return
result
;
}
/**
* Get the sort key and length of a chunk.
*/
private
static
int
[]
getKey
(
int
[]
random
,
byte
[]
data
,
int
start
,
int
maxPos
)
{
private
static
int
[]
getKey
(
byte
[]
data
,
int
start
,
int
maxPos
)
{
int
minLen
=
4
*
1024
;
int
mask
=
4
*
1024
-
1
;
int
factor
=
31
;
int
hash
=
0
,
mul
=
1
,
offset
=
8
;
int
min
=
Integer
.
MAX_VALUE
;
int
max
=
Integer
.
MIN_VALUE
;
int
pos
=
start
;
long
bytes
=
0
;
for
(
int
j
=
0
;
pos
<
maxPos
;
pos
++,
j
++)
{
hash
=
hash
*
factor
+
random
[
data
[
pos
]
&
255
];
if
(
j
>=
offset
)
{
hash
-=
mul
*
random
[
data
[
pos
-
offset
]
&
255
];
}
else
{
mul
*=
factor
;
}
bytes
=
(
bytes
<<
8
)
|
(
data
[
pos
]
&
255
);
int
hash
=
getHash
(
bytes
);
if
(
hash
<
min
)
{
min
=
hash
;
}
...
...
@@ -488,10 +484,13 @@ public class ArchiveTool {
max
=
hash
;
}
if
(
j
>
minLen
)
{
if
(
j
>
minLen
*
4
)
{
if
(
(
hash
&
mask
)
==
1
)
{
break
;
}
if
((
hash
&
mask
)
==
1
)
{
if
(
j
>
minLen
*
4
&&
(
hash
&
(
mask
>>
1
))
==
1
)
{
break
;
}
if
(
j
>
minLen
*
16
)
{
break
;
}
}
...
...
@@ -516,13 +515,27 @@ public class ArchiveTool {
key
[
3
]
=
len
;
return
key
;
}
private
static
void
combine
(
InputStream
in
,
OutputStream
out
,
String
tempFileName
)
throws
IOException
{
private
static
int
getHash
(
long
key
)
{
int
hash
=
(
int
)
((
key
>>>
32
)
^
key
);
hash
=
((
hash
>>>
16
)
^
hash
)
*
0x45d9f3b
;
hash
=
((
hash
>>>
16
)
^
hash
)
*
0x45d9f3b
;
hash
=
(
hash
>>>
16
)
^
hash
;
return
hash
;
}
private
static
void
combine
(
InputStream
in
,
OutputStream
out
,
String
tempFileName
)
throws
IOException
{
long
lastTime
=
System
.
currentTimeMillis
();
int
bufferSize
=
16
*
1024
*
1024
;
DataOutputStream
tempOut
=
DataOutputStream
tempOut
=
new
DataOutputStream
(
new
BufferedOutputStream
(
new
FileOutputStream
(
tempFileName
)));
// File: header length chunk* 0
// chunk: pos* 0 data
DataInputStream
dataIn
=
new
DataInputStream
(
in
);
byte
[]
header
=
new
byte
[
4
];
dataIn
.
readFully
(
header
);
...
...
@@ -530,18 +543,15 @@ public class ArchiveTool {
throw
new
IOException
(
"Invalid header"
);
}
long
size
=
readVarLong
(
dataIn
);
// out
// pos [,pos..., 0] chunk1, pos [,pos..., 0] chunk2,..., 0
// temp-exp
// segment1: pos1, chunk, pos3, chunk, pos5, chunk, 0
// segment2: pos2, chunk, pos4, chunk, 0
long
outPos
=
0
;
long
inPos
=
0
;
ArrayList
<
Long
>
segmentStart
=
new
ArrayList
<
Long
>();
long
lastTime
=
System
.
currentTimeMillis
();
boolean
end
=
false
;
// Temp file: segment* 0
// Segment: chunk* 0
// Chunk: pos* 0 data
while
(!
end
)
{
int
segmentSize
=
0
;
TreeMap
<
Long
,
byte
[]>
map
=
new
TreeMap
<
Long
,
byte
[]>();
...
...
@@ -602,7 +612,7 @@ public class ArchiveTool {
new
File
(
tempFileName
).
delete
();
dataOut
.
flush
();
}
/**
* A stream of chunks.
*/
...
...
@@ -611,6 +621,11 @@ public class ArchiveTool {
DataInputStream
in
;
boolean
readKey
;
/**
* Read the next chunk.
*
* @return the number of bytes read
*/
int
readNext
()
throws
IOException
{
current
=
Chunk
.
read
(
in
,
readKey
);
if
(
current
==
null
)
{
...
...
@@ -624,21 +639,28 @@ public class ArchiveTool {
return
current
.
compareTo
(
o
.
current
);
}
}
/**
* A chunk of data.
*/
static
class
Chunk
implements
Comparable
<
Chunk
>
{
ArrayList
<
Long
>
idList
;
int
[]
sortKey
;
byte
[]
value
;
final
byte
[]
value
;
private
int
[]
sortKey
;
Chunk
(
ArrayList
<
Long
>
idList
,
int
[]
sortKey
,
byte
[]
value
)
{
this
.
idList
=
idList
;
this
.
sortKey
=
sortKey
;
this
.
value
=
value
;
}
/**
* Read a chunk.
*
* @param in the input stream
* @param readKey whether to read the sort key
* @return the chunk, or null if 0 has been read
*/
public
static
Chunk
read
(
DataInputStream
in
,
boolean
readKey
)
throws
IOException
{
ArrayList
<
Long
>
idList
=
new
ArrayList
<
Long
>();
while
(
true
)
{
...
...
@@ -664,7 +686,14 @@ public class ArchiveTool {
in
.
readFully
(
value
);
return
new
Chunk
(
idList
,
key
,
value
);
}
/**
* Write a chunk.
*
* @param out the output stream
* @param writeKey whether to write the sort key
* @return the number of bytes written
*/
int
write
(
DataOutputStream
out
,
boolean
writeKey
)
throws
IOException
{
int
len
=
0
;
for
(
long
x
:
idList
)
{
...
...
@@ -719,8 +748,15 @@ public class ArchiveTool {
return
0
;
}
}
public
static
int
writeVarLong
(
OutputStream
out
,
long
x
)
/**
* Write a variable size long value.
*
* @param out the output stream
* @param x the value
* @return the number of bytes written
*/
static
int
writeVarLong
(
OutputStream
out
,
long
x
)
throws
IOException
{
int
len
=
0
;
while
((
x
&
~
0x7f
)
!=
0
)
{
...
...
@@ -731,8 +767,14 @@ public class ArchiveTool {
out
.
write
((
byte
)
x
);
return
++
len
;
}
public
static
long
readVarLong
(
InputStream
in
)
throws
IOException
{
/**
* Read a variable size long value.
*
* @param in the input stream
* @return the value
*/
static
long
readVarLong
(
InputStream
in
)
throws
IOException
{
long
x
=
in
.
read
();
if
(
x
<
0
)
{
throw
new
EOFException
();
...
...
@@ -755,7 +797,7 @@ public class ArchiveTool {
}
return
x
;
}
private
static
long
printProgress
(
long
lastTime
,
int
low
,
int
high
,
long
current
,
long
total
)
{
long
now
=
System
.
currentTimeMillis
();
...
...
h2/src/tools/org/h2/dev/fs/ArchiveToolStore.java
浏览文件 @
56b943f8
...
...
@@ -64,7 +64,7 @@ public class ArchiveToolStore {
System
.
out
.
println
(
"-extract <file> <targetDir>"
);
}
}
private
void
compress
(
String
sourceDir
)
throws
Exception
{
start
();
long
tempSize
=
8
*
1024
*
1024
;
...
...
@@ -275,7 +275,7 @@ public class ArchiveToolStore {
System
.
out
.
println
(
"Compressed to "
+
FileUtils
.
size
(
fileName
)
/
MB
+
" MB"
);
printDone
();
}
}
private
void
start
()
{
this
.
start
=
System
.
currentTimeMillis
();
...
...
@@ -328,14 +328,14 @@ public class ArchiveToolStore {
break
;
}
}
storeTemp
=
new
MVStore
.
Builder
().
fileName
(
tempFileName
).
autoCommitDisabled
().
open
();
MVMap
<
Integer
,
String
>
fileNames
=
storeTemp
.
openMap
(
"fileNames"
);
MVMap
<
String
,
int
[]>
filesTemp
=
storeTemp
.
openMap
(
"files"
);
int
fileId
=
0
;
for
(
Entry
<
String
,
int
[]>
e
:
files
.
entrySet
())
{
...
...
@@ -344,7 +344,7 @@ public class ArchiveToolStore {
totalSize
+=
e
.
getValue
().
length
/
4
;
}
storeTemp
.
commit
();
files
=
filesTemp
;
long
currentSize
=
0
;
int
chunkSize
=
0
;
...
...
@@ -379,7 +379,7 @@ public class ArchiveToolStore {
}
}
fileId
++;
}
}
storeTemp
.
commit
();
}
...
...
@@ -450,7 +450,7 @@ public class ArchiveToolStore {
}
currentSize
++;
printProgress
(
50
,
100
,
currentSize
,
totalSize
);
}
}
for
(
Entry
<
String
,
int
[]>
e
:
files
.
entrySet
())
{
String
f
=
targetDir
+
"/"
+
e
.
getKey
();
int
[]
keys
=
e
.
getValue
();
...
...
@@ -464,19 +464,19 @@ public class ArchiveToolStore {
}
new
FileOutputStream
(
f
).
close
();
}
}
}
if
(
file
!=
null
)
{
file
.
close
();
}
store
.
close
();
storeTemp
.
close
();
FileUtils
.
delete
(
tempFileName
);
System
.
out
.
println
();
printDone
();
}
private
int
getChunkLength
(
byte
[]
data
,
int
start
,
int
maxPos
)
{
int
minLen
=
4
*
1024
;
int
mask
=
4
*
1024
-
1
;
...
...
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